raster and rgdal eliminated.

[jonjab]

Closes #88

I updated scripts and calls to libraries in each episode to eliminate raster and rgdal.

This lesson also has a code directory, inside of which is a lot of dead and defunct code that reads as leftover from the development of the lesson. I edited it enough so that the repo builds in workbench, but it might be a good idea to get rid of that entire /code/ directory.

[github-actions]

🆗 Pre-flight checks passed 😃

This pull request has been checked and contains no modified workflow files, spoofing, or invalid commits.

It should be safe to Approve and Run the workflows that need maintainer approval.

[tobyhodges]

Looks great to me. Thanks so much @jonjab, I really appreciate you taking the time to work on this.

I will leave it open for a few more days, in case any of the lesson Maintainers also want to take a look. I will come back and merge next week if not.

[tobyhodges]

Ah, looks like maybe the code/R/dc-spatio-temporal-intro/07-spatial-resolution-extent.R file still needs to have raster and rgdal removed?

I think we will have to update the renv.lock file too, to remove the packages as dependencies, before this will build. I can take care of that, if needed.

[jonjab]

I don't know anything about how to do the renv.lock file,
but I did take care of ep7.r in my fork.

[tobyhodges]

Merging this now, so that I can take care of the lockfile more easily